As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LOWER CHORD AREA OF THE FS 266.5 FLOORBEAM SUFFERED HEAT DAMAGE FROM AN ELECTRICAL WIRE ARCING BETWEEN RBL 23 & 30. THE LOWER CHORD AND LOWER PORTION OF THE FLOORBEAM WEB WERE CUT OUT OVER A 6.5 INCH LONG X 2.7 INCH HIGH AREA TO REMOVE ALL AREAS OF HEAT DAMAGE. THE CUTOUT WAS REPAIRED WITH AN ALUMINUM DOUBLER AND TWO ALUMINUM REPAIR CHANNELS PER ER/A 379869-14, REV A.